| 质量标准： |
项目Item 分析纯
（AR）
含量Assay,% 99.5-100.5
pH(50g/L溶液，25℃） 5.8-6.4
澄清度试验Clarity 合格
水不溶物Insoluble matter in water,% ≤ 0.01
灼烧残渣（以硫酸盐计）Ignition residue,% ≤ 0.01
氯化物(Cl)Chloride,% ≤ 0.001
硫酸盐(SO4)Sulfate,% ≤ 0.001
铵(NH4)Ammonium,% ≤ 0.002
铁(Fe)Iron,% ≤ 0.0005
品级Grade 药典级
(Ph. Eur., BP, USP, 99-101%)
含量assay(以干基计) 99-101%
可水解物hydrolyzable substances, complies
有机挥发性不纯物organic volatile impurities, complies (GC)
残留溶剂residual solvents, complies
重金属heavy metals (as Pb) ≤0.001%
茚三酮阳性物质other ninhydrin-positive substances ≤0.5%
灼烧残渣ign. residue ≤0.1% (as SO4)
干燥损失loss on drying ≤0.2% , 105 °C, 2 h
pH 5.9-6.4 (20 °C, 5%)
pKa (25 °C) 2.35
氯chloride (Cl-): ≤50 ppm
硫酸根sulfate (SO42-): ≤50 ppm
溶液外观appearance of solution complies
硫酸反应物质reaction against H2SO4 complies
红外鉴别identity (IR) complies
品级Grade 分子生物学级
(for molecular biology, ≥99.0% (NT))
含量assay ≥99.0% (NT)
DNA酶DNases, none detected
RND酶RNases, none detected
不溶物insoluble matter, passes filter test
磷酸酶phosphatases, none detected
蛋白酶proteases, none detected
灼烧残渣ign. residue ≤0.05% (as SO4)
干燥损失loss on drying ≤0.05% , 20 °C (HV)
pKa (25 °C) 2.35
盐酸溶解性solubility 1 M HCl: soluble1 M at 20 °C, clear, colorless
氯chloride (Cl-): ≤50 ppm
硫酸根sulfate (SO42-): ≤50 ppm
阳离子cation traces by ICP Atomic emission
Al: ≤5 ppm
As: ≤0.1 ppm
Ba: ≤5 ppm
Bi: ≤5 ppm
Ca: ≤10 ppm
Cd: ≤5 ppm
Co: ≤5 ppm
Cr: ≤5 ppm
Cu: ≤5 ppm
Fe: ≤5 ppm
K: ≤50 ppm
Li: ≤5 ppm
Mg: ≤5 ppm
Mn: ≤5 ppm
Mo: ≤5 ppm
NH4+: ≤200 ppm
Na: ≤50 ppm
Ni: ≤5 ppm
Pb: ≤5 ppm
Sr: ≤5 ppm
Zn: ≤5 ppm
λ 1 M in 1 M HCl
UV absorption
λ: 260 nm A: ≤0.01
λ: 280 nm A: ≤0.01
品级Grade 电泳级
(for electrophoresis, ≥99%)
外观Appearance 白色至类白色粉末
纯度Purity ≥99.0% (GC)
水溶解试验solubility in water 2 GM /10 ML WATER, clear
不溶物Insoluble matter ≤0.01%
pKa (25 °C) 2.35
氯chloride (Cl-): ≤70 ppm
重金属heavy metals (as Pb): ≤20 ppm
UV absorption A280 ≤ 0.15(1 M)
For use in electrode buffers for page complies
In transfer buffers for western blots complies
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